Designated as UNS N07750 or W. Nr. 2.4669, Inconel X750, also known as “Alloy X750”, is a nickel-chromium alloy similar to Inconel 600 but made precipitation hardenable by additions of aluminum and titanium. The alloy has good resistance to corrosion and oxidation along with high tensile and creep-rupture properties at temperatures up to about 1300°F(700°F). Its excellent relaxation resistance is useful for high-temperature springs and bolts. The Inconel 718 can also be used in gas turbines, rocket engines, nuclear reactors, pressure vessels, tooling, and aircraft structures.

1. Chemical Composition Requirements

Element	Content, %
Nickel (plus Cobalt)	≥70.00
Chromium	14.0-17.0
Iron	5.0-9.0
Titanium	2.25-2.75
Aluminum	0.40-1.00
Niobium (plus Tantalum)	0.70-1.20
Manganese	≤1.00
Silicon	≤0.50
Sulfur	≤0.01
Copper	≤0.50
Carbon	≤0.08
Cobalt	≤1.00

2. Physical Properties

Density		Melting Range		Curie Temperature,°F	Magnetic Permeability, 70°F, 200H	Linear Contraction during Precipitation Treatment(1300°F/20hr), in/in
lb/in3	g/cm3	°F	°C	As hot-rolled	As Hot-Rolled	Hot-Rolled	20% Cold-Rolled	Annealed
0.299	8.28	2540-2600	1393-1427	-225	1.0020	0.00044	0.00052	0.00026

3. Product Forms and Related Standards of Inconel X750

Products Form	Standard
Rod, Bar and Forging	ASTM B637, ISO 9723-9725
Plate, Sheet and Strip	ISO 6208
Wire	BS HR 505

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